Oxyacetylene torch



F. J. NAPOLITAN OXYACETYLENE TORCH Filed April 20. 1920 A TTOR/VEY Fotented lllay i3, 192%.

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FRANCIS JOHN NAPOLITAN, F SPRINGFIELD, MASSACHUSETTS, ASSIGNOB, BY mien ASSIGNMENTS, T9 am REDUCTION CUMPANY, INCORPORATED, 015 NEW YORK,

N. '5? A GORTOMTIQN 0F NEW YORK.

@XYACETYLENE TQRCH.

Application filed April 20, 1920. serial No. 375,193.

To all whom it may concern:

Be it known that l, FRANCIS JOHN Naronr- TAN, a citizen of the United States, and resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements Relating to Oxyacetylene Torches, of which the following is a specification.

The invention comprises improvements re- .10 lating to oxyacetylene and like torches, the

object of which is to overcome or mitigate the of such explosive mixture in an enlarged mixing chamber intermediate the prelimi- 2 nary mixing passages and the flame exit, and

accessible to the latter, a back-fire it one occurs will pro agate with explosive violence in such cham er and expire, being unable to roceed up the rear passa es, and the supply rom these passa es 130- t e chamber being momentarily chec ed. The desired result may be further favored by a bafiing of the gases in the mixing chamber.

In the accompanying drawing illustrating a preferred form of oxyacetylene torch embod ing and for carrying out the invention: ig. 1 is a section through the head and tip, taken in the axial planes; and

Fig. 2 is a cross-section of the tip on the line 22 of Fig. 1.

The invention is particularly applicable to torches of the interchangeable, sealed mixing tip variety and in a specific aspect is an improvement therein. The body or perma nent art of the torch comprises a head 2, and pipes 3 and 4 forming oxygen and acetglene supply conduits, acetylene being t typical combustible gas in these torches. These conduits are suitably valved at the rear end of the torch (not shown) and are connected by the usual flexible hose with the (ill Kill

regulators by which the pressures are regulated. The invention has to do more particularly with torches wherein both gases are supplied under positive pressures to force them through the ports and passages in the requisite ultimate proportions for the flame; and the oxygen is preferably supplied under materially higher pressure than the acetylene for reasons of safety.

Channels 5, 6 in the head, forming the ter minal portions of the supply conduits, open, respectively, into the back and side of a conical ground socket 7. The interchangeable part or tip 8 has a corresponding truncated conical rear portion 9 ground for sealing contact with the socket. This known form of seal is preferred, but others may be employed. The sealing portion of the tip has two circumferential grooves 10, 11, which improve the seal and form part of the passageway tor the gases. The forward groove 11 is positioned to communicate with the acetylene channel 6. A nut 21 serves to hold the tips in place with sealing pressure.

For convenience in manufacture the tip may be made in two pieces 12, 13, as shown, permanently 'joined as a unitary part. The rear piece 12 bearing the conical sealing ortion 9 contains a plurality of longitu mal preliminary combining passages 14, 1t, two being sufficient. The passage 14: has a longitudinal restricted oxygen inlet port 15 at its rear end, leading from the roove 10. The passage 14 has a relative y large longitudinal oxygen inlet port 15, preferably the full diameter of the passage, leading from the same groove. A single acetylene inlet port 1h leads from the groove 11 laterally inward to the passage 14; and a plurality of acetylene inlet ports '16, for example three, each of substantially the same size as the port 16, lead inward from said groove to the passage i l. The ports 16, 16 are proportionmg ports, that is to say in conjunction with the acetylene pressure determined for the particular size of tip they determine the total flow of acetylene to the flame exit. Thus, the efiective areas of the oxygen ports for the two passa es are different, and the same is true of t e acetylene ports, the arrangement being such that the so that a back-fire wi combined stream which flows through the passage 14 contains a substantial excess of acet ene, while that in the passage 14 has a su stantial excess of, oxygen. Further, the proportions are such that the total of the streams will produce a final mixture of the desired pro ortional composition. This articular com ination of ports is preferre as being most advantageous in a tip of the form shown, but other, equivalent combinations ma be employed.

e acetylene ports 16, 16 all being of the same size can be in substantially direct communication with the supply conduit, through the groove 11. This might also be the case a to the oxygen inlet ports; but where these ports are of different sizes, as shown, it is not convenient to proportion the total oxygen flow by means of them, and for this purpose I preferably employ a common restricted oxygen proportioning port 17, leadin diagonally from the rear extremity o the ti to the rear groove 10. This port is also a vantageous as its delivery end can be nearer the restricted oxygen inlet port 15 than the large port 15''.

The portion 13 of the tip contains an enlarged common mixing chamber 18, into whlch the passages 14, 14c deliver. Said passages may converge as shown, some advantage being secured thereby; but they may be said to be substantially arallel. At the front of the tip, leading om the mixing chamber is a flame bore exit 22. This passage is of a diameter a propriate for the size of flame desired, an the mixing chamber is enlarged with reference thereto. Said chamber is near enough to the flame orifice 1 pass to the chamber and there produce an explosion, which momentarily checks theflow in the preliminary combining passages 14, 14 and goes no farther, the mixtures in these passages because of their proportions being incapable of backfiring, or at least notreadily back-firing. The normal flow is then resumed and the flame is re-established at the exit. Both the normal and this occasional operation of the torch can be im roved by baflling the gases in the mixing 0 amber. A variety of baffimg arrangements may be employed, as for example a plug 19 containing numerous perforations 20. a

The invention is not limited to a single flame exit from the mixin chamber, as it is also a licable to multiple jet torches.

What claim as new is:

1. An oxyacetylene or like torch, characterized by means for bringing the two gases together in a plurality of streams of differentcomposition proportions and means for combining saidstreams within the torch to form a mixture of the desired propor tione.

2. An oxyacetylene or lilce torch, characand like torches containing a pluralit terized by means having ports and passages designed to bring the two gases together in a plurality of streams, respectively oxidizing and reducing, so as to be substantially non-flashing.

3. An oxyacetylene or like torch having supply conduits for the two gases, a plurality of preliminary combining passages in parallel relation, means for conducting and introducing the gases from the supply conduits to said preliminary combining passages in different proportions, and a common mixing chamber wherein the preliminary mixtures of difl'erent proportional composi-' tion combine to form a mixture of the pro portions desired for the flame.

4. An oxyacetylene or like torch having supply conduits for the two gases, a plurality of preliminary combining passages in substantially parallel relation, means for conducting and introducing the gases from the supply conduits to said preliminary combining passages in diflerent proportions, a flame exit, and an enlarged mixing chamber intermediate the flame exit and the preliminary combining passa es.

5. An oxyacetylene or ike torch having supply conduits for the two gases, a plurality of preliminary combining passages in substantially parallel relation, means for conducting and introducing the gases from the supply conduits to said preliminary combining passages in different proportions, a flame exit, an enlarged mixing chamber intermediate the flame exit and the preliminar combining passages, and means for be ing the gases in the mixing chamber.

6. An oxyacetylene or like torch having supply conduits for the two gases, a plurality of preliminary combining passages in substantially parallel relation, a common mixin chamber intermediate said passages and t e flame exit, oxygen and acetylene inlet ports to said passages, the eifective area of the oxygen ports being relativel lar e for one part of the passages and relative y small for the other part and vice versa as to the acetylene ports, and a common proportioning port intermediate one of the supply conduits and the corresponding inlet ports of the preliminar combining passages.

'7. A replaceab e part for oxyacetylemz o preliminar combinin ports for t e two kinc s of gases thereto, the inlet orts of different passages being different y proportioned in such manner that in one part of the passages one gas and in the other art the other gas is in excess,

while the otal forms the desired proportional mixture for the. flame.

8. A replaceable tip for oxyacetylene and like torches having its rear portion formed for sealing contact with the part of the Ill passages with inlet torch containing the supply conduits, and m being such that the desired mixture results in the common mixing chamber.

9. A replaceable part for oxyacetylene or like torches having its rear portion formed for sealing contact with the part of the torch containing the supply conduits, inlet ports for the two kinds of gases in its sealing portion, and a plurality of preliminary combining passages delivering to a common mixing chamber, there being sets of inlet ports for the two kinds of gases to said passages differently proportioned so that the oxygen is in excess in one passage and the acetylene in another, and a common proportioning port controlling the flow of one of the ases to the corresponding inlet ports of all t e passages.

10. A replaceable part for oxyacetylene or like torches having its rear portion formed for sealing contact with the part of the torch containing the supply conduits, inlet ports for the two kinds of gases in its sealing ortion, and a plurality of preliminary com ining passages delivering to a common mixing chamber, there being sets of inlet ports for the two kinds of gases to said passages differently proportioned so that the oxygen is in excess in one passage and the acetylene in another, and a common proportioning port controlling the flow of one of the ases to the corresponding inlet ports of al the passages, the inlet ports supplied from this proportioning port being of difi'erent sizes, While the inlet ports for the other kind of gas are of substantially the same size but different in number for the respective passages.

11. A replaceable part for oxyacetylene or like. torches having its rear portion formed for sealing contact with the part of the torch containing the supply conduits, with two grooves in such sealing portion and a common proportioning port elivering into one of said grooves, sald interchan eable part further containing a plurality-0 preliminary combining passages delivering to a' common mixing chamber, and sets of inlet ports from the two grooves to the respective passages, the inlet ports from the groove supplied by said common proportioning port eing of different sizes, while the inlet ports from the other groove are different in number for the respective passages.

12. A method of controlling the gases in oxyacetylene and like torches which comprlses preliminarily combining the gases in separate streams which are respectively oxidizing and reducing, and thereafter and prior to the delivery into the atmosphere combining said streams into a mixture of the desired proportions.

13. A method of controlling the gases in oxyacetylene and like torches which comprlses preliminarily combining the gases in separate streams which are respectively oxidizing and reducing, and thereafter expanding and commingling said streams and maintaining a body 0 explosive mixture accessible to the flame exit.

FRANCIS JOHN NAPOLITAN. 

